Selenenylated dihydropyrans prepared by inverse demand hetero-Diels–Alder reactions undergo oxidative rearrangement when treated with H2O2, leading to tetrahydrofuran-2-ones by ring contraction.
Formation of 2-phenylselenenylenones and 2-haloenones from enones. Mechanistic and synthetic aspects, X-ray crystal structures of intermediates
作者:Lars Engman、Karl Wilhelm Törnroos
DOI:10.1016/0022-328x(90)80171-u
日期:1990.7
by X-ray diffraction. Although this and similar compounds were readily dehydrohalogenated to give vinylic selenides, they were ruled out as intermediates in the synthesis of 2-phenylselenenylenones from enones and the 1:1 complex of PhSeCl and pyridine.